The International Electrotechnical Commission has classified film, television photography and theatre stage lighting as a specialized lighting technology field. For the quartz halogen bulbs and metal halide lamps, the models of the lamp caps, lamp holders and gauges have been internationally named.
The lamp holder and lamp holder models for film, television photography and stage lighting are composed of English letters and characteristic main parameter parameters that characterize their structural features. They generally consist of three parts: the first part represents the type of lamp holder and lamp holder; The two parts represent the size of the mating part of the lamp cap and the lamp holder; the third part represents the number of the lamp caps, the number of conductive contacts of the lamp holder or the number of pins. Their constituent factors are specified as follows:
1. Representing the symbol of the type of lamp holder and lamp holder for film, television photography and stage lighting
(1) Representation symbols for the types of lamp holders and lamp holders for film, television photography and stage lighting, expressed in the following English capital letters:
F single pin base or socket
G-pin or socket for G-pin or multi-pin style
P pre-focusing lamp holder or lamp holder
The y behind the GyG indicates that the two pins (holes) at the lamp end are not equal in diameter, which is a big one.
(2) The lamp holders are of the same type and some of the same features, but the interchangeable lamp caps or lamp holders can be marked with x, y or z after the original model letter of the lamp cap or lamp holder, such as G9. The center distance of the double pins of the Type 5 and Gx9.5 bases is 9.53 mm, and the outer diameters of the pins are also the same, but they cannot be interchanged due to the difference in width and thickness of the base. (Note: If necessary, add the English letters such as xx, xxy, xz, yx, yy, yz, zx, zy, and zz to the word line of the original model.)
(3) The shape of the socket for the lamp pin or socket is indicated by the following lowercase English letters:
a cylindrical pin (for the lamp cap) or jack (for the lamp holder)
c special shaped pin (for the lamp cap) or jack (for the lamp holder)
2. The matching dimensions of the lamp holder and the lamp holder for film, television photography and theater stage lighting are indicated by Arabic numerals. For the pin or the lamp end is expressed as an approximation of the diameter, for the lamp holder, the approximate value of the jack diameter is used, for the pre-focusing cap sleeve outer diameter (sector and socket type) or the positioning plate outer diameter (positioning disc type) Said.
3, the number of lamp pins or the number of conductive contacts of the lamp holder
The number of pins of the lamp cap or the number of holes of the conductive contact of the lamp holder are indicated by lowercase English letters, as specified below:
S1 only
D2 only (can be omitted without causing misunderstanding)
T3 only
Q4 only
P5 only
4, the type and size of the pin type lamp holder
In the international standard, the type and size of the pin-type base only indicate the style and matching size of the base structure that matches the corresponding type of lamp holder, affecting its versatility and interchangeability, instead of indicating the size of the pin-type lamp holder, the lamp manufacturer All must be enforced. Outside the specified shape and size range, the manufacturer can determine the type and size of other parts according to the user's needs.
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